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aphid parasite

Catalogue: Broadacre Field Crops DAFF QLD
Spotted alfalfa aphid, Therioaphis trifolii, adults, showing leaf damage, yellowing or whitening of the leaf veins.. In eastern Australia, aphids appear to have declined in pest status since the introduction to Australia of bluegreen aphid (BGA) and spotted alfalfa aphid (SAA) in the 1970s when they caused widespread damage... Initial symptoms are yellowing or whitening of the leaf veins...
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